How does BIOS help a computer to boot up?

The BIOS in modern PCs initializes and tests the system hardware components ( Power-on self-test ), and loads a boot loader from a mass storage device which then initializes a kernel.

What does BIOS stand for?

What is BIOS? As your PC’s most important startup program, BIOS, or Basic Input/Output System, is the built-in core processor software responsible for booting up your system. Typically embedded into your computer as a motherboard chip, the BIOS functions as a catalyst for PC functionality action.

How do I access the BIOS on Windows 10?

There are a handful of ways to access the BIOS from Windows 10. The simplest way to access the BIOS is with the Start button. Click the Start button, hit the power icon, and then hold Shift while you click “Restart.” Alternatively, you can hit the Start button, in the search bar type “Change Advanced Startup Options” and then hit Enter.